Removing NaN values in deserialization Web API 2 C#

喜欢而已 提交于 2019-12-06 09:59:24

I eventually figured out how to solve the issue for both read and write.

jsonFormatter.SerializerSettings.Converters.Add(new FloatConverter());

public class FloatConverter : JsonConverter
{
    public override bool CanRead
    {
        get
        {
            return true;
        }
    }

    public override bool CanWrite
    {
        get
        {
            return true;
        }
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        if (value == null)
        {
            writer.WriteNull();
            return;
        }

        var val = Convert.ToDouble(value);
        if (Double.IsNaN(val) || Double.IsInfinity(val))
        {
            writer.WriteNull();
            return;
        }
        if (value is float)
            writer.WriteValue((float)value);
        else
            writer.WriteValue((double)value);
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        if (reader.TokenType == JsonToken.Null)
            return null;

        var value = JValue.Load(reader);
        var val = Convert.ToDouble(value);

        if (objectType == typeof(Double))
        {
            if (Double.IsNaN(val) || Double.IsInfinity(val))
                return (Double)0.00;
            else
                return (Double)value;
        }

        if (objectType == typeof(float?))
            return (float?)value;
        else
            return (float)value;
    }

    public override bool CanConvert(Type objectType)
    {
        return objectType == typeof(double) || objectType == typeof(float);
    }
}
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